Culvert.



in isi] forming part ,cured 1"--r-tiattcn the walls of t aml has been mainly in the natnre of corrugationa extending erally circumferen- UNITED ammo PATENT UFFICEO I. I. not-an. OI VIII, IAILCHUIITTI, ASIXGNOI T0 OIOIGI A. aaoannonrn. TED-1'13, OI NEWTON Cllllll. IAISACBUBII'TI.

CULVIBT.

947,778. mu-m u wwmm- Patented Jan. 25, new. Anlllaflen Ital Iebraary ll. 1'00. Berta! m. $76.88.

To a whom it concern: are formed by the caving away of earth be- Be it known that I, Janna P. DOLAI, of Revere, in the county of Suflolh and State of Ma-achueetta, have invented certain new and uaeful Improvements in Culverts, of

which the follow' is a specification reference being bad to he accompanying rowthereof.

is invention has reference to improvcments in culva-ta or conveying pipes and particularly to test metal culverts.

One object of the invention is to so construet a sheet metal culvert reinforced by reason of the peculiar construction of its wall that wall aeetioua dt-imilar in longitudinal dupe may be simply and eflciently setogether to revnt undue leakage. Anotherobjecto theinvention iatoeocondruet a sheet. metal culvert comprising aegmental members diflering in details of allege that one of naid members may he'atrengt ened lonqiltudinall while another of said Incubus at l tranevcse y. Another oh of the invention is-to so construct a that the same may he completely drained.

The invention coaaata in such peculiar features of construction and combination of hereinafter be mm fully deaaii branilpointedottitiutheclagma. k I

re repreaen a rs ve v w o thehnproved conduit or Fig. 9, represents a longitudinal section thereof taken on line H li'ig. 1. Fif 8, represents a aacti'onalgwtahnon ineH F3 1, showing same embedded in earth. if. 4, reg-ants, croaectional view of a cu vert ludratm g modilled construction.

Similar nu 11,0! reference designate correepondi parts throughout.

Sheet meta culverts or conduits are gen orally reinforced and strengthened by bend mg or otherwise conforming the sheet ma- ..tcrial to increase the reaistance thereof to exterior pressures. Thia reinforcement has been ordinarily of Iuch nature as to better most pressure that mi t otherwise tend to culvert or conduit tlallv of the pipe orming the culvert or com uit. in such constructions no edditionul resistance has-been effected as regurtle the hcluling of the conduits between unmpportmi [mintfl tin-roof, as whore cuvitics strengthened to resist deeet metal conduit by strai it flanges secured to the outward bends V of tie corrugations and having openings between the inward bends of and corrugattions and said flanges through which earth and debris could enter the culvert and clog the same. I

- In, carrying this invention into practice my object has metal pipes for use as culvertgand for similar purposes, that said pipe should be pressures from without in several directions and which construction would be adapted to better sustain itself between points unsup rted from without. My ob'ect has been a so to so construct a pipe 0 this nature that, when embedded in earth,external pressures exerted on the upper portion of the conduit will be mrtially restated by a portion of the earth avin eomo similarity to a Ire one for the arch owned the upper we! of the culvert.

e shown in the drawings the upper .tion of the culvert in formed from form abutmenta for the ends of the corrugationa 5-6 andthe langea 8-8 act as confining walls for the outer-bends of the corrugations and are secured to such bends, preferably by the bolts 9-9.

when the pipe, constructed as above degcrtbed, is laced in the earth and the earth is tamped ncath said pipe or culvert as shown in Fig. 3 a portion of the earth is lo cutmi between the outer surfaces of the radint hhouldors f -7 and otfcra resistance to. premium tendin to bend downward such shoulders while e nbutmont of the corrutions 5 5 against said #houlders 7--7 cfectuully closes the channels between raid corrugntinns no that earth can not be washed or Hlflt'ti into the conduit. to any connidornbio 110 been to so construct sheet 7 

